What scale of measurement (i.e. ratio, nominal, etc.)

Question

Rosenzweig, Bennett, and Diamond (1972) studied rats to determine whether an enriched environment could increase brain size. The rats were randomly assigned to one of three conditions: standard cage, "enriched" cage, or "impoverished" cage

Answer 1

It probably makes sense to interpret Enriched as being better than Standard, which in turn is better than Impoverished. If so, then the scale is Ordinal. Otherwise, the scale is Nominal.